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 Post subject: Coil on Plug Conversion
PostPosted: Mon Mar 17, 2008 10:07 pm 
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1 BBL (New)

Joined: Sat Jan 05, 2008 10:30 pm
Posts: 6
Location: FLORIDA
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I was wondering if anyone has tried to convert the slant six to coil on plug? I have been considering it for my next project.


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 Post subject:
PostPosted: Mon Mar 17, 2008 10:15 pm 
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EFI Slant 6

Joined: Mon Nov 05, 2007 1:48 pm
Posts: 351
Location: PDX, OR
Car Model:
distributorless igntion will still need a cam/crank sensor for the trigger... and an ecu to control it

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'72 Valiant DD for over a decade-225-Disc brakes, big T-bars, big Sway bars f/r, carter bbd/super six, GM HEI, 2- 12" subs in trunk, 1000w amp...
'77 cherokee cheif widetrack-360-33x12.5 tires-no lift. keeps driveway dry-project/backup DD/mudder


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 Post subject:
PostPosted: Mon Mar 17, 2008 10:23 pm 
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Joined: Sat Feb 08, 2003 2:37 pm
Posts: 4194
Location: CA
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I put some passing thought into it. Right now I'm running Ford EDIS controlled by megasquirt. It would be trivial, electric wise to convert to COP. No major (electrical) re-engineering to do. May have to run dual modules to get more current on the primary side. Mounting the coils would be the trickiest part. This would be kind of cheating though, it would still function as wasted spark.

I thought I read about some megasquirt firmware that could drive individual coils per cylinder.

What ecu were you thinking about for COP?


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 Post subject:
PostPosted: Tue Mar 18, 2008 6:17 pm 
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Joined: Fri Nov 01, 2002 8:20 pm
Posts: 1603
Location: Oxford, Georgia
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It's something I plan to try next after my turbo upgrade. It shouldn't take nearly as long as the turbo has taken. :) My plan is to do a dyno shootout and see how coil on plug compares with a MSD 6A firing the distributor. I've already started setting up a crank trigger for it.

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'66 Dart - turbocharged 225
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 Post subject:
PostPosted: Tue Mar 18, 2008 6:34 pm 
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EFI Slant 6

Joined: Mon Nov 05, 2007 1:48 pm
Posts: 351
Location: PDX, OR
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is the ford edis waste spark?

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'72 Valiant DD for over a decade-225-Disc brakes, big T-bars, big Sway bars f/r, carter bbd/super six, GM HEI, 2- 12" subs in trunk, 1000w amp...

'77 cherokee cheif widetrack-360-33x12.5 tires-no lift. keeps driveway dry-project/backup DD/mudder


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 Post subject:
PostPosted: Tue Mar 18, 2008 8:19 pm 
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Joined: Sat Feb 08, 2003 2:37 pm
Posts: 4194
Location: CA
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Yep it is. Easy way to tell - coil packs have one wire for the positive feed, and one negative wire per pair of coils.


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 Post subject:
PostPosted: Wed Mar 19, 2008 6:21 pm 
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EFI Slant 6

Joined: Mon Nov 05, 2007 1:48 pm
Posts: 351
Location: PDX, OR
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isnt that a way to determine the mated pairs as well...?

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'72 Valiant DD for over a decade-225-Disc brakes, big T-bars, big Sway bars f/r, carter bbd/super six, GM HEI, 2- 12" subs in trunk, 1000w amp...

'77 cherokee cheif widetrack-360-33x12.5 tires-no lift. keeps driveway dry-project/backup DD/mudder


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 Post subject:
PostPosted: Wed Mar 19, 2008 6:36 pm 
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Joined: Sat Feb 08, 2003 2:37 pm
Posts: 4194
Location: CA
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Not sure what you mean by mated pairs. There are diagrams on the msns/msns-e sites of which plug towers equate to which pins on the harnes connector.


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 Post subject:
PostPosted: Wed Mar 19, 2008 11:16 pm 
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EFI Slant 6

Joined: Mon Nov 05, 2007 1:48 pm
Posts: 351
Location: PDX, OR
Car Model:
im just speakin mated pairs on the cyls. like when two pistons are goin down at the same time regardless of which cycle they are on...

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'72 Valiant DD for over a decade-225-Disc brakes, big T-bars, big Sway bars f/r, carter bbd/super six, GM HEI, 2- 12" subs in trunk, 1000w amp...

'77 cherokee cheif widetrack-360-33x12.5 tires-no lift. keeps driveway dry-project/backup DD/mudder


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 Post subject:
PostPosted: Thu Mar 20, 2008 5:48 am 
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Joined: Fri Nov 01, 2002 8:20 pm
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Location: Oxford, Georgia
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They're 3 cylinders apart on the firing order.

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'66 Dart - turbocharged 225

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 Post subject:
PostPosted: Thu Mar 20, 2008 1:13 pm 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6291
Location: So California
Car Model: 64 Plymouth Valiant
1 5 3 6 2 4

1 & 6

5 & 2

3 & 4


You'll notice that the members of the pairs are split between the front 3 cylinders and the rear 3 cylinders and the symmetry of their locations

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

8)


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 Post subject:
PostPosted: Sun Mar 23, 2008 6:21 am 
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Supercharged

Joined: Sun Jun 04, 2006 4:53 pm
Posts: 4295
Location: Gaithersburg MD
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Good explanation Ems!

Sam

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 Post subject:
PostPosted: Tue Apr 08, 2008 9:01 pm 
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2 BBL ''SuperSix''
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Joined: Mon Apr 07, 2008 4:15 pm
Posts: 19
Location: Las Vegas,NV
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I know this is a silly ? but how deep are the spark plug tubes? Or another way of asking is how long would the coil need to be?

This is a 3.2 chrysler coil
Image

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1970 Vitamin C Duster 225 2bbl 904 eventually turbo efi r154 5 speed

1969 B5 blue roadrunner 383/727 soon to be turbo slant (JK)

1972 Barracuda was green 318 who knows?


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 Post subject:
PostPosted: Sun Apr 20, 2008 6:28 pm 
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EFI Slant 6

Joined: Mon Nov 05, 2007 1:48 pm
Posts: 351
Location: PDX, OR
Car Model:
i would assume a little shorter than that. you gotta rember that those coil on plugs typicly go through the valve cover as well so they gotta be a bit longer...

_________________
'72 Valiant DD for over a decade-225-Disc brakes, big T-bars, big Sway bars f/r, carter bbd/super six, GM HEI, 2- 12" subs in trunk, 1000w amp...

'77 cherokee cheif widetrack-360-33x12.5 tires-no lift. keeps driveway dry-project/backup DD/mudder


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 Post subject:
PostPosted: Sun May 18, 2008 5:09 am 
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Turbo EFI
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Joined: Wed Feb 23, 2005 1:50 pm
Posts: 2353
Location: Pertneer Nashville TN
Car Model:
What's the advantage of the coil on plug?

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto :-( Dually Clubcab needs a injector pump
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